Exponential and Logarithmic Functions

Is the graph linear, exponential or neither?

• Linear
• Exponential
• Neither

Is this exponential growth or decay?

• Growth
• Decay

Identify the initial value:

y = 6.87 (4)^x

• a = 4

• a = 6.87

• a = 3

• a = 1

The expression 12(1.015)^t models the population of elephants in a wildlife refuge after t years since 1975.
Is the population of elephants increasing or decreasing?

• Increasing
• Decreasing

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

Jay'den earned $475 from mowing lawns last summer. He deposited this money in an account that pays an interest rate of 3.8% compounded annually. Jay'den wants to know his balance after 15 years?

What does $475 represent?

• Principal or initial value, P

• Rate of interest, r

• Number of times interest is compounded, n

• Time, t

Emily would like to buy some new furniture for her home. She decides to buy the furniture on credit with 9.5% interest compounded quarterly.

If she spent $7,400, what exponential equation can be used to find how much she will pay after 8 years.

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Logarithmic functions are the inverse of...

• Linear Functions
• Exponential Functions 
• Quadratic Functions 
• Polynomial Functions